In picture-perfect Rosewood, Pennsylvania, pictures often lie-and so do Rosewood's four prettiest girls.

Hanna's on a mission to corrupt Rosewood's youth, starting with a very attractive sophomore. Aria's snooping into her boyfriend's past. Spencer's stealing-from her family. And pure little Emily's abstaining from abstinence.

The girls should be careful, though. They thought they were safe when Ali's killer was arrested and A's true identity was finally revealed. But now there's a new A in town turning up the heat. And this time Rosewood is going to burn.

This is number 6 in Pretty Little Liars .

There are 304 pages in this book. This book was published 2011 by Little, Brown Book Group .

Sara Shepard lives in the US. Pretty Little Liars was inspired by her own upbringing in Philadelphia.